WIP

lucas-zimerman · lucas-zimerman · commit 25bddc44fa24 · 2021-03-16T09:45:00.000-03:00
diff --git a/Samples/Sample.Xamarin.Core/CustomControls/CustomWebView.cs b/Samples/Sample.Xamarin.Core/CustomControls/CustomWebView.cs
@@ -0,0 +1,13 @@
+﻿using Xamarin.Forms;
+
+namespace Sample.Xamarin.Core.CustomControls
+{
+    /// <summary>
+    /// Sadly this extra class is required since you can't scale things properly 
+    /// with the default WebView.
+    /// Custom render, here we go :D
+    /// </summary>
+    public class CustomWebView : WebView
+    {
+    }
+}
diff --git a/Samples/Sample.Xamarin.Droid/Renderer/CustomWebViewRenderer.cs b/Samples/Sample.Xamarin.Droid/Renderer/CustomWebViewRenderer.cs
@@ -0,0 +1,67 @@
+﻿using Android.App;
+using Android.Content;
+using Android.OS;
+using Android.Runtime;
+using Android.Views;
+using Android.Widget;
+using Sample.Xamarin.Core.CustomControls;
+using Sample.Xamarin.Droid.Renderer;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Threading.Tasks;
+using Xamarin.Forms;
+using Xamarin.Forms.Platform.Android;
+using static Android.Webkit.WebSettings;
+
+[assembly: ExportRenderer(typeof(CustomWebView), typeof(CustomWebViewRenderer))]
+namespace Sample.Xamarin.Droid.Renderer
+{
+    public class CustomWebViewRenderer : WebViewRenderer
+    {
+        public CustomWebViewRenderer(Context context) : base(context)
+        {
+
+        }
+
+        protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
+        {
+            base.OnElementPropertyChanged(sender, e);
+
+            Control.SetWebViewClient(new ExtendedWebViewClient(Element as CustomWebView));
+
+        }
+
+        class ExtendedWebViewClient : Android.Webkit.WebViewClient
+        {
+            private CustomWebView _xwebView { get; set; }
+            public ExtendedWebViewClient(CustomWebView webView)
+            {
+                _xwebView = webView;
+            }
+
+            async public override void OnPageFinished(Android.Webkit.WebView view, string url)
+            {
+                if (_xwebView != null)
+                {
+                    _xwebView.HeightRequest = 0d;
+                    await Task.Delay(100);
+                    var result = await _xwebView.EvaluateJavaScriptAsync("(function(){return document.body.scrollHeight;})()");
+                    Console.WriteLine(result);
+                    var newResult = result;
+                    for (int i = 0; i < 1000 && result == newResult; i++)
+                    {
+                        await Task.Delay(100);
+                        newResult = await _xwebView.EvaluateJavaScriptAsync("(function(){return document.body.scrollHeight;})()");
+                        Console.WriteLine(newResult);
+                    }
+                    _xwebView.HeightRequest = Convert.ToDouble(newResult);
+                    view.SetInitialScale(40);
+
+                }
+
+                base.OnPageFinished(view, url);
+            }
+        }
+    }
+}
